Grate-bar



(No Mod-ell.)

' G. M. KNIGHT.

GBATE BAR.

No. 404,719. Patented June 4, 1889.

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GEORGE M. KNIGHT, OF ADRIAN, MICHIGAN.

G RATE-BAR.

SPECIFICATION forming part of Letters Patent No. 404,719, dated June 4,1889.

Application filed September 26, 1888. Serial No. 286,473. (No model.)

T0 all whom, t may con/007W:

Be it known that I, GEORGE M. KNIGHT, a citizen of the United States,residing at Adrian, in the county of Lenawee and State of Michigan, haveinvented certain new and useful Improvements in Grate-Bars to be usedunder Boilers and in Furnaces, of which the following is aspecification.

My invention relates to improvements in' grates for furnaces of allkinds, more particularly, however, for steam-boiler furnaces; and itconsists in certain novelties in the construction, arrangement, andcombination of the various parts, all of which I will now proceed topoint out and describe, reference being had to the accompanyingdrawings, in which Figure I is a plan view of my apparatus with two ofthe grate-sections removed. Fig.

2 is a side elevation of the same, and Fig. 3 is an end elevation of oneof the pipes with the grate in section.

Similarletters refer to similar parts throughout the several views.

In the above drawings, J represents a series of pipes which extendlongitudinally underneath the grate-bars and are provided on one endwith the removable caps I. The opposite ends of these pipes communicatewith a chamber G. At regular intervals and cast integral with the pipes.I are the bearingplates d. These bearing-plates are adapted to receivethe ends of the grate-sections L and support the same, and are providedon their upper surfaces with a small lug b, adapted to rise up betweenthe bars of the grate-section, and thus hold the latter in place. Thepipes .I are provided on their upper surfaces between the bearing-plateswith numerous ori- Iices or perforations d.

The operation of my apparatus will now be understood. The chamber G isconnected with a fan for creating an air-current. Air is forced into thechamber G and from it ough combustion.

I am also 4enabled by the use of my apparatus to utilize the cheapestkinds of fuelsuch as slack coal, screenings, and sawdust. The peculiararrangement of the grate-sections adapts them for ready removal andreplacing, should one burn out, without disturbing the rest.

By providing each individual pipe with an end cap, and by removing thesame, each pipe can be readily cleaned out, irrespective of the others,and consequently much more thoroughly than if all had to be cleaned atthe same time.

What I claim isl. A grate for a furnace, consisting of a series of pipesextending underneath and adjacent to a series of grate-sections andprovided on their upper surfaces with perforations, of bearings on saidpipes formed integral therewith for supporting said grate-sections,substantially as described.

2. The combination, in a furnace-grate, of the grate-sections L, pipesJ, having perforations cl,bearingplates a, formed integral with saidpipes and provided with lugs b, and a chamber G, into which said pipesextend and from which a current of air is supplied'to the pipes,substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE M. KNIGHT.

Witnesses:

THos. M. HUNTER, FRED R. SEGER.

